Boiler feed apparatus.



W. L. oswAL-n.

- BOILER FEED AHMIATUS.

Arnlcmbn min sm. 1s. um'.

" Patented Deen 25,1917.

2 SHEETS-SHEET l.

. Innung w.AL. oswALnn BOILE FEED APPARATUS'. Y APPLICATIQN FILED SEPT.19| |916.

1,251,092. n mm M125,- 1911.

2 SHEETS-SHEET 2. 1

To all whom it may` concern:

UNITED STATES PATENT OFFICE. y

WALTER L. OSWALD, OF NEW YORK, N. Y., ASSIGNOR TO CRANE COMPANY, OFCHICAGO,

l ILLINOIS, A CORPORATION F ILLINOIS.

' BOILEB FEED APPARATUS.4

speeiiication of Letters Patent. Patented Dee. 25, 1917.

Application led September 19, 1916. Serial No. 120.923.

Be it known that I, WALTER L. Oswann,

a. citizen of the United States, residingat 4New Yorkcity .county of NewState of New Yorkand York, havel invented certain new and usefulImprovements in a Boiler Feed A paratus, of which the following is aspeci cation.

M invention relates in general to boiler feeding apparatus, and hasreference more particiilarlyftotliat type in which a supply ofcondensate or other feed water is passed to a boileror tank through themediumof a trap or like device, and wherein it has been the customarypractice to provide supplementary devices of a character requiringattention, as feed water pumpsor pump governors, with the purpose inview of maintaining the water level in the boiler.

The chief aim of this invention is to improve the construction, andincrease the eiciency and utility of apparatus of this character; andhas for its principal ob'- jeets the following: First, to produce animproved form of apparatus in which the supplementar devices, abovereferred to, are eliminate( and wherein the feed water dis charge to theboiler is automatically controlled. In other words, the watei` is fed bythe trap to the boiler without requiring any attention whatsoever on thepart of an operator when the water-line is below the predeterminedlevel, and trap action in the way of discharging water automaticallyceases when the water rises toresume its predetermined level in theboiler. Second; to efl'ect an automatically controlled supply of feedwater to the boiler proportionate to the demand for steam, e., the'loadon the boiler. Third; to maintain a more uniform- Water level in theboiler than heretofore maintained by the eniployment of the customarysupplementary controlling devices; and fourth; to provide a simple andinexpensive automatically controlled feeding system which is positive inoperation and which has no involved or intricate mechav nism requiringeither attention, inspection or adjustment.

These, together with such other objects as may hereinafter appeal', oraieiucidcut to my invention, lattain by means of the construct-ionillustrated in preferred forni in the accompanying drawings, wherein:-

Figure 1 represents a front elevation of my improvedapparatus, theupper'portion of the boiler being sectional;

y Fig. 2 is a view in perspective of the prei ferred type of trapforming part of said apparatus; and l Fig. 3 is an enlarged detail insection of the T portion of the trap trunnion.

Referring to the drawings, the letter B designates the boiler providedwith the usual fire tubes 6 and having the steam space "7 locatedintermediate the head 8 and the normal-water.level indicated by thenumeral 9. Mounted iii any suitable or convenient manner above theboiler B is a re= eeiver R -receiving' its supply of condensate or otherfeed water through the inlet or drip return pipes 10. The letter T in Fi1 designates a `direct return trap-desirabiI mounted on the head of theboiler, being above the steam space and below the receiver R andoperating through its connec l tions with the boiler and receiver toreceive a supply offeed water and discharge the same into theboiler atsuch times as they forth in Letters Patent #1,114,141 of v The trap, asshown, occupies the position" when empty or inv process of being filled,and comprises a base 11 provided withl the connected valve casings 12and 13 and the boxes 14 and 15 in which are trunnioned the outer ends ofthe pipes 1G and 17, both valve casings alternately communicatingthrough the. pipe 1 6 with the tank 18 as the latter tilts on lts axis.The numeral 19 indicates the customary counterbalance weight pivotallyconnected with the tank by the rod 20 and fulcrunied on the strap 21which may be connected -with the base 11 in any suitable manner. Securedto the inner ends` of the truni'iion pipes 16 and 17 by coupling members22 is a. T 23 whose inner portion has a threaded engagement at 23 withthc neck 18 of the tank and projects there through to receive the steamconducting pipe 24, which latter communicates with the pipe the pipe 17to Vthe interior of the tank, said` vent pipe extending .the valvecasing 12 to theupper portion of 16. This inner' portion is also formedwith a water conducting opening leading from the receiver R and providedwith a check valve'3l; and 32 designates a live steam inlet pipe havingits upper end jconnected with the inlet side-of the valve casing 13 andextendin ,through thesteam space of the boiler to ave its lower endterminal at the 'approximate'normal water level, indicated -in Fig. 1 ofthe drawings at 9.

'an provides an avenue of escape operatin .the receiver through Thevalves in the casings 12 and 13 re-l ceive'alternate actuatin on thetilting of the tank by means'of t e valve stems, 12* and 13,respectively, which are operated by the levers`12 and 13 suitablyfulcrumed and' connected'with'the tank, so that when the tank is filledandv drops the vent line is closed and the steam inlet is o ened and thelive steam entering the tan through the ipe 2 4 drives the accumulatedwater out of t e tankvia the T-v opening 25, pipe 17, and` thencethroulgh the discharge'pipe 29 intothe boiler. ilting of the tank in theop osite direction opens the vent` line 30 of the to the receiver,thereby uce a flow of water from steam in'tlie tra to pr and opening 25to the tank interior, the pressure gradually diminishing in v the tankcloses the valve 31 and effects an overhalancin of pressure inthereceiver to accelerate this flow to the trap.

From the foregoing, it will be apparent that when the water line is atnormal the inlet end of, the steam vconducting pipe 32 *is closed offfrom the steam in the steam As the demand for steam upon the s ace.bldiler lowers the water line to a point -below the inlet end of thepipe, the steam in the steam Space has a clear avenue of low tothe trapand in the manner hereinbefore set forth efiects a discharge of the tankcontents through the pipe 29 to the boiler, the

the pipes 28 and 17V tank filling and again dischar -ng as often asmaybe necessary tobring t e water line to a predetermined level,vwhereuponthe discharging actionof the tank at once ceases. Hence it isobvous'that the feeding of the water to -the boiler is not onlyautomaticalli controlled but the suppl of feed water to t e boilercorresponds `to t e demand for steam. l

1. In a boiler feed apparatus, the combination of a boiler; aself-contained feed water 4receptacle having an upper inclosed portionconstituting 'a pressure retaining and water heating chamber for thefeed water therein; a steam trap embodying a i tilting tank providedwith' steam and water conducting connections with said boiler and saidreceptacle; one of said steam conducting connections leading from thetank interior to the pressure -chamber ofthe said receptacle and theother leading 'from' the steam space of the boiler to the'interiorxof'the tank and normally closed at its inlet r.end by the water in theboiler; and val lmeans for said connections, ,part of means actuable bythe tilting of and the other part pressure actuated; substantially asdescribed andv for the purpose set fort/h.

'2. An automatic boiler feed system comthe taak prising vin combinationwith a boiler; a seli,

lcontained feed water container having n feed water inlet and an upperinclosed portion veonstitutin a ressure retaining and water heating c amr for the feed water entering therein; a steam trap embodying atiltingtank provided with a pressurechamber intermediate the boiler andsaid. container, and having steam and water con'd'uctin connectionswit'nsaid boiler and contuner; one of said steam condilcting connectionsleading from tlie pressiii'e! chamber of the tank to the pressurechamber of said container and the other leadin rom the steam space ofthe boiler tot e pressure chamben` of the tank and normally closed attsinlet rend by the water in the boiler;

n valvplar means for said connections, part of said means tank actuatedand another part actuated by the pressure in said pressure chambers.

In testimony whereof I have hereunto set my hand and seal to thisspecification.

WALTER L. OSWALD. [La]

